The Illinois Department of Transportation (IDOT) is a state agency responsible for managing the transportation system in Illinois. This includes overseeing the construction and maintenance of highways, bridges, and public transit systems. IDOT also works to improve road safety and promote efficient transportation options for residents and businesses. In addition to infrastructure, IDOT is involved in planning and funding transportation projects across the state. The agency collaborates with local governments and other organizations to enhance mobility and accessibility. Through its efforts, IDOT aims to support economic growth and ensure safe travel for all users of the transportation network.